Hi! 1st Time, Can't Program &<SelectParameters&> And Searching Around Brings No Definite Answer
Mar 22, 2008
Hello to all coding members!
I'm building my first ever complete website in the ASP.net VB language and I have to say, I'm pretty happy that I was able to learn from this website and to gain some ground.
Data retrieval and editing from tables and databases was very intuitive with the Visual Web Developer IDE. I even learnt simple ways to implement (and to script a bit of) login pages to make my visitors feel "at home" in my website.
However, when I wanted to implement simple Business Logic into one of my ASP.net page, i happen to stumble upon a block.
Business Logic: To have the server go through the whole table of storybook entries submitted by many users, but only pull out the storybook entry(s) that belong to the logged-on user.
Hence, let me drill down to my specific questions:
I will be using VB. Coming from a JavaScript genre, my concern is: will putting the Business Logic code into a code-behind page (.vb) or dumping it onto the page itself have any errors or effects?
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Dec 15, 2006
I am using VS2005 (VB) to develop a PPC WM5.0 Program. And I am using SQLCE 3.0. My PPC Hardware is in 400MHz.
The question is when the program try to insert the first record into sdf database after each time the program started. It takes a long time. Does anyone know why and how can I fix it?
I will load the whole database into a dataset when the program start and do all the "Insert", "Update", "Delete" in this dataset and fill it into database after each action.
cn.Open()
sda = New SqlCeDataAdapter(SQL, cn) 'SQL = Select * From Table
scb = New SqlCeCommandBuilder(sda)
sda.Update(dataset)
cn.Close()
I check the sda.update(), it takes about 0.08s for filling one record into database normally. But:
1. Start the PPC Program
2. Load DB into dataset
3. Create a ONE new record in dataset
4. Fill back to DB
When I take this four steps everytime, the filling time is almost 1s or even more!
Actually, 0.08s is just a normal case. Sometimes, it still takes over 1s to filling back a dataset which only inserted one record when the program is running. (Even all inserted records are exactly the same in data jsut different in the integer key)
However, when I give up the dataset and using the following code:
cn.Open()
Dim cmd As New SqlCeCommand(SQL, cn) ' I have build the insert SQL before (Insert Into Table values(XXXXXXXXXXXXXXX All field)
cmd.CommandType = CommandType.Text
cmd.ExecuteNonQuery()
cn.Close()
StartTime = Environment.TickCount
I found that it is still the same that the first inserted record takes more time, but just about 0.2s. And the normal insert time is around 0.02s. It is 4 times faster!!!
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Jan 15, 2007
HI! Thank you for even looking at this question.
I need to get a website up and running for a small group of people. I've had SQL Server for a while, but didn't have any use for it. It came with Visual Studio 2005, which gave me a little know how on scripting. Now, I have Visual Web Developer and what I need to make a web page. I just need to know how to configure all my settings to allow my website to be viewed online by anyone with an internet connection. I'm a person that understands detailed or simple directions, but I can not seem to find directions online. Now, I know what your thinking, but I've never attemped anything like this before. So, please, HELP! I need and want to learn as much as possible.
Thank you, tecfreak213
P.S. also, how do I change or get a web address? Thanks.
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Jan 11, 2008
Hi
I need data fields in the page header. The report is multiple pages. I have multiple fields I need in the page header. These fields will change on each page.
I've tried everything I can find suggested on this forum. They all either don't work or work for a while. Then, as is the case today, we get a problem with a report that renders perfectly in the RS browser but when it's output to a PDF, a couple of the page headers become confused.
Why can't Microsoft provide a hack that actually works somewhere (Maybe I just can't find it)? A sticky at the top of the forum?
I'm currently using the answer supplied by NB at AeM here http://forums.microsoft.com/msdn/showpost.aspx?postid=638813&siteid=1&sb=0&d=1&at=7&ft=11&tf=0&pageid=1 As I said it works very nicely, thanks , except for when it doesn't export properly to a PDF which is an MS issue I presume not the solutions issue.
I really need to be able to make this work before I start throwing my toys from my pram and so my boss doesn't think I'm a complete idiot. I'm sure he doesn't believe me when I say I can't put data in a report header, after all it's only the most basic of reporting functions.
Can anyone please help with a 100% solution?
Cheers
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Sep 8, 2007
I am using visual basic 2008
I am making a program, I used sql server compact edition (sdf) (i think it is no more only for mobile device, I am working for desktop application)which i created with the same visual basic. i update data by using table adapters,
when I close the program and build again, the data previosly updated are deleted, and I get empty database?? why is that. do i need to set some copy to.........properties. i have used copy if new.
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Aug 27, 2005
Dear GroupCan anyone provide a sample query for the following scenario?Let's assume I want to search for an order someone placed which mightbe an individual or company. An individuals first name is stored incolumn FirstName And the individuls last name in column LastName of thecontact table and the company name is stored in column CompanyName ofthe company table.If a user issues a query with CName parameter how can I search allthese columns and tables at the same time to see if there's a match? Imight add that there's a column in the orders table that holds0=Contact 1=Company but ideally I don't want to use this column.Thanks very much for your help and efforts.Martin
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Jan 12, 2006
I have the time of an event stored on each record as a datetime field.Itincludes the year,month,day, etc. Suppose my user wants to search the tablefor all events over the lunch hour, say between11am and 1pm. How do Iconstruct the SELECT query to peek into each datetime field and return onlythose records that satify the specified time range?Many thanks.
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Jul 20, 2005
> This is what I want to do with the data table below.[color=blue]>> I only want it to show one id for each issue. ( ie, 4001 only once,> 4002 only once, etc. But only the one with the latest date and time)>> Ie. 4001 should only be in the table once, with the latest date -> which should be :> 400109/12/200317:12:09 (as I only want to show the last time> the id was updated - do you get me now )>> Ie. 4002 should show only 400211/12/200315:25:13>[/color][color=blue]>>> idhs_change_datehs_change_time> 400127/10/200310:38:27> 400109/12/200314:43:58> 400109/12/200317:12:09> 400227/10/200310:56:28> 400209/12/200314:44:11> 400211/12/200315:25:13> 400327/10/200311:13:12> 400309/12/200314:44:21> 400310/12/200310:48:02> 400310/12/200313:25:09> 400427/10/200311:28:09> 400409/12/200314:44:29> 400409/12/200317:18:28> 400527/10/200315:55:40> 400528/10/200310:18:24> 400627/10/200315:59:47> 400628/10/200310:18:38> 400609/12/200314:44:40> 400609/12/200316:47:15>[/color]
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Sep 4, 2007
I have several versions of one SSIS Dataflow component. I need to bind some of them( definite version) to my SSIS package. How can I do that?
Thanks in advance.
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May 23, 2007
why we use sql exceptions ...
what the program will do if we caught that exception .. i need some suggestions ... i got this exception(String or binary data would be truncated.
The statement has been terminated.).. will it affect the functionality of the program...
hiow can i avoid this exception..
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Jul 12, 2006
I am hoping this is something simple, a security piece I've messed up.
When I run my dts package manually I get no errors and sucessful completion of each step. So I set my SQL Agent to run thepackage 15 minutes after every hour between 5am and 5pm, these being 15 minutes after the times the new data files are dropped to me.
But instead of running the package it disconnects all the remote desktop users and fails. When remote users can get back on we are faced with a system has recovered from a serious error message. The error message posted to the event logs is empty though.
Any one have any ideas?
We are running MS Server 2003 and SQL Server 2000
Thanks,
Carrie
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Dec 24, 2006
I'm pulling a "Number (8)" data type field for a date (formatted YYYYMMDD) from a Oracle 9i database. When the value is inserted into the database it is set a zero (A non-null database for the most part), otherwise it is for example 20061224. If the date field has a value the date is displayed correctly, but if it is zero then I get the "#Error" message.
Here is one of many iif expressions I've tried.
=iif(Len(CStr(Fields!DTE_MAILED.Value)) = 8,
((CStr(Fields!DTE_MAILED.Value)).Substring(4,2) + "/" + Right(CStr(Fields!DTE_MAILED.Value), 2) + "/" + Left(CStr(Fields!DTE_MAILED.Value), 4))
,
Nothing)
Now I've returned the value with out any formatting done to the string, and it will return "0"(zero) or a number. I've returned the lengths of the returning value and it comes back "1" or "8". I read a lot of previous posts and I thought at first that it was because I was trying to do a substring function on the zero value getting a index error. So I've changed the iif test condition many different ways with no prevail. I read a previous post where someone ended up doing his work in his SQL, but I would like to find out how to do this in the report. This is a simple expression, so I feel like there is something obvious I don't know maybe something with the format mask.
All help will be appreciated!
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Mar 10, 2000
Hello,
After launching MS SQL Server 7.0 SP 1 on a Compaq Proliant 5500 with 1GB memory the sqlservr.exe process gradually consumes all available memory and brings down NT.
This happens when there's appearently no activity on SQL Server.
What's going on?
Stef
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Apr 19, 2007
All rows of a 1500+ record text file we have at work should be 512 spaces. Some are not and seem to be causing problems. I get half the records I should be getting on an import. When the DTS task comes across one of these records it takes it and appends them together and makes two rows one row. Any ideas? I tried making a table with one field of datatype char(1000) and tried to import into this table. I figured this would add any missing trailing spaces but no go.
ddave
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May 9, 2007
is there a setting in Query Analyzer that will let me bring all the records
right it only shows up to 4282 records
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Apr 20, 2010
I'm trying to import some XLS files that I receive from some suppliers. The problem is that every time they send some columns with text values but formatted as number. When I read those columns with SSIS Excel Source, they come all with null values.
I don't want to change the columns data types every time, so I would like to know if there's a way to bypass the column types that are already there.
I tried to use both the Jet driver and the Office 12 driver. I've already used the IMEX=1 on ExtendedProperties too with no success. Is there a way to force reading the columns as text, even if they have data types assigned to them?
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May 21, 2007
Can I return a value in a variable from a SSIS program back to C# after the SSIS program is run from C#?
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Feb 10, 2008
Hi there!Basicly I only want to retrieve the value of the field "FirstTime" from a record as shown below:1
2 Dim ProdUserID As String = "samurai"
3
4 Dim LoginSource As New SqlDataSource()
5
6 LoginSource.ConnectionString = ConfigurationManager.ConnectionStrings("ASPNETDBConnectionString1").ToString()
7
8 LoginSource.SelectCommandType = SqlDataSourceCommandType.Text
9 LoginSource.SelectCommand = "SELECT FROM aspnet_Users (FirstTime) VALUES (@FirstTime) WHERE UserName=@ProdUserID"
10
11 Dim SeExiste As Boolean = LoginSource.SelectParameters.GetValues("@FirstTime")
12
This is the error reported:Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: BC30455: Argument not specified for parameter 'control' of 'Public Function GetValues(context As System.Web.HttpContext, control As System.Web.UI.Control) As System.Collections.Specialized.IOrderedDictionary'. Please can you answer in the same logical schema? I'm a newbie so if you may, describe the process step by step. It would be easier for me to understand.Thanks in advance.
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Mar 10, 2008
What am I forgetting to do? I am setting the SELECT parameter 'techcode' in the code behind trying to paqss it as the ZWOP in my SQL Select statement but it is not getting to the SQl SelectParameters statement. Do I need to place a TextBox control on the ASPX page to hold it?
ERROR: Exception Details: System.InvalidOperationException: Could not find control 'techcode' in ControlParameter 'ZWOP'.
CODE BEHINDint techcode;protected void Page_Load(object sender, EventArgs e){ techcode = 11; }
ASPX CODE. . . SelectCommand="SELECT [ZL_ID], [complete], [error], [Zip], [ZipCity], [ZipState], [ZWOP] FROM ZipData WHERE ([complete] = 0 OR [complete] IS NULL ) AND [ZWOP] = @techcode ORDER BY Zip" <SelectParameters> <asp:ControlParameter ControlID="techcode" Name="ZWOP" PropertyName="SelectedValue" Type="Int16" /> </SelectParameters>
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Apr 3, 2008
What im looking to do is put a checkbox on my page and if the box is checked have it add a where clause to the sql statement.
The most i have seen with selectparameters is for it to basically take the value of the given control (or whatever) and dump it in to a query.
In this case what i would like to do is if the box is not checked it has my basic query run Select * from Table
and if the box is checked i would like it to run Select * from table where status='completed'
basically a check box that shows only completed items.
wasnt sure if i could do this with just the sqldatasource control and some selectparameters or if i had to write some code.
Thanks
Justin
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Mar 12, 2008
This would actually be funny if I weren't under serious time constraints right now. I have an SSIS project with several script tasks in the control flow. I put breakpoints in one of them to allow me to step through and see whats going on. However, when I start the project, the IDE brings up the script editor for a different script task. The breakpoints in this task are actually on the same line numbers as the task I need to debug but the code is all wrong. I checked the task for which the code is being displayed and there are no breakpoints there.
Thanks for the assist!
Don
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Oct 24, 2006
Hi , I am trying to write a report generator by simply using a form and then a gridview that query's the database based on what the user selects on the form. Anyways, I update the SQL parameters similar to below code. I just want to know how i can tell the parameter to get ALL values from the parameter instead of a specific value. For example if the user wanted to see ALL the records for CustomerName what would i set the parameter default value to? I tried the asterisk but that did not work. Please guide me....Thanks! MattSqlDataSource1.SelectParameters["CustomerName"].DefaultValue = "some value";<asp:SqlDataSource ... > <SelectParameters> <asp:Parameter Name="CustomerName" /> </SelectParameters></asp:SqlDataSource>
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Feb 16, 2007
Hi,
I am using Visual Web Developer 2005 Express Edition.
I am trying to SELECT three information fields from a table when the Page_Load take place (so I select the info on the fly). The refering page, sends the spesific record id as "Articleid", that looks typically like this: "http://localhost:1424/BelaBela/accom_Contents.aspx?Articleid=2". I need to extract the "Article=2" so that I can access record 2 (in this example).
How do I define the SelectParameters or QueryStingField on the fly so that I can define the WHERE part of my query (see code below). If I remove the WHERE portion, then it works, but it seem to return the very last record in the database, and if I include it, then I get an error "Must declare the scalar variable @resortid". How do I programatically set it up so that @resortid contains the value that is associated with "Articleid"?
My code is below.
Thank you for your advise!
RegardsJan/*******************************************************************************
* RETRIEVE INFORMATION FROM DATABASE
*******************************************************************************/
// specify the data source
string connContStr = ConfigurationManager.ConnectionStrings["tourism_connect1"].ConnectionString;
SqlConnection myConn = new SqlConnection(connContStr);
// define the command query
String query = "SELECT resortid, TourismGrading, resortHits FROM Resorts WHERE ([resortid] = @resortid)";
SqlCommand myCommand = new SqlCommand(query, myConn);
// open the connection and instantiate a datareader
myConn.Open();
SqlDataReader myReader = myCommand.ExecuteReader();
// loop thru the reader
while (myReader.Read())
{
Label5.Text = myReader.GetInt32(0).ToString();
Label6.Text = myReader.GetInt32(1).ToString();
Label7.Text = myReader.GetInt32(2).ToString();
}
// close the reader and the connection
myReader.Close();
myConn.Close();
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Apr 4, 2007
Hello,
I am sure there is a way to do this programmatically, but it is just not sinking in yet on how to go about this. I have a page where I use a dropdownlist that goes into a gridview and then the selected item of the gridview into the detailsview (typical explain seen online). So, when selecting from the dropdownlist, the gridview uses a controlparameter for the selectparameter to display the appropriate data in the gridview (and so on for the detailslist).
My question is - I wanted to use this same page when coming in from a different page that would utilize querystring. So, the parameter in the querystring would be for what to filter on in the gridview, so the dropdownlist (and that associated controlparameter) should be ignored.
Any suggestions on how to go about this? I assume there is some check of some sort I should in the code (like if querystring is present, use this querystringparameter, else use the controlparameter), but I am not sure exactly what I should check for and how to set up these parameters programmatically.
Thanks,
Jennifer
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Apr 27, 2008
Hi,
I am using a grid view with parameter defined in dropdown list. the asp code is:
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Pubs %>"
SelectCommand="SELECT [au_id], [au_lname], [au_fname], [state] FROM [authors] WHERE ([state] = @state)"
DeleteCommand="DELETE FROM [authors] WHERE [au_id] = @au_id">
<SelectParameters>
<asp:ControlParameter ControlID="DropDownList1" Name="state" PropertyName="SelectedValue"
Type="String" /></SelectParameters>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Pubs %>"
SelectCommand="SELECT [au_id], [au_lname], [au_fname], [state] FROM [authors] WHERE ([state] = @state)"
DeleteCommand="DELETE FROM [authors] WHERE [au_id] = @au_id">
<SelectParameters>
<asp:ControlParameter ControlID="DropDownList1" Name="state" PropertyName="SelectedValue"
Type="String" />
</SelectParameters>
</asp:SqlDataSource>
</asp:SqlDataSource>
I would like to to set the parameter assignment in my VB code in Page_Load methodWhen i am using:
SqlDataSource1.SelectParameters("state").DefaultValue = DropDownList1.Text
SqlDataSource1.SelectCommand = "SELECT [au_id], [au_lname], [au_fname], [state] FROM [authors] WHERE ([state] = @state)"I get error message saying: Object reference not set to an instance of an object.
Any ideas how I can set the select parameters (in my VB code) to use the dropdown list I have in my page?
Thanks,
Uzi
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Dec 30, 2005
Hi All,
I'm trying to set the SelectParameters of SqlDataSource from the code behind.
This is my query: SELECT * FROM [UploadSessions] WHERE ([OwnerID] = @OwnerID)And I need to set the value of the @OwnerID at the code behind since it is stored in an object.
How can I do it??
Thanks in advance
Bar
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Oct 24, 2006
Hi,I have a GridView which is bound to a SqlDataSource that connects to Oracle. Here's the code: <asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:OracleConnectionString %>"
ProviderName="<%$ ConnectionStrings:OracleConnectionString.ProviderName %>" SelectCommand="SELECT QUIZ.TITLE FROM QUIZ WHERE (QUIZ.USERNAME = @UserName)"> <SelectParameters> <asp:SessionParameter Name="UserName" SessionField="currentUser" Type="String" /> </SelectParameters> </asp:SqlDataSource> As you can see I'm trying to pass the value of the "currentUser" session variable to the query. I get an error message "ORA-xxx Illegal name/variable". Where am I going wrong? I tested the connection by placing a specific value instead of the "@UserName" and it worked.
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Nov 24, 2006
Column1 in table 1 has a range from 1 to 5 (int)
A CheckboxList displays these 5 items. When checked (for example 1 and 4) I want a gridview with sqldatasource=sqlProducts to display the records where column1 values 1 or 4.
When I use the code below I only get the records where column1 values 1....
<asp:SQLDataSource id="sqlProducts" Runat="Server" SelectCommand="Select * From Table1 where Column1 IN (@CBLchecked_items)" ConnectionString="<%$ ConnectionStrings:pubs %>"> <SelectParameters> <asp:ControlParameter Name="CBLchecked_items" ControlID="CBL" propertyname="SelectedValue" type="String" /> </SelectParameters></asp:SQLDataSource>
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Feb 28, 2007
ALTER PROCEDURE dbo.Default_Edit1
(
@ID int,
@Family Nvarchar (100) OutPut
)
AS
/* SET NOCOUNT ON */
SELECT @Family=Family FROM Table1 where (ID=@ID)
RETURN
SqlDataSource1.SelectParameters.Add("ID", Me.GridView1.DataKeys(CInt(e.CommandArgument)).Item(0))
SqlDataSource1.DeleteCommandType = SqlDataSourceCommandType.StoredProcedure
SqlDataSource1.SelectCommand = "dbo.Default_Edit1"
SqlDataSource1.SelectParameters("Family").Direction = Data.ParameterDirection.Output
Label3.Text = SqlDataSource1.SelectParameters("Family").Direction.ToString()
it's have error
I went to return 1 fild
??
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Mar 14, 2008
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:CollegeDatabaseConnectionString %>" SelectCommand="SELECT employee_datails.* FROM employee_datails WHERE memberid !=@id OR memberid OR memberid==uid"> <SelectParameters> <asp:SessionParameter Name="id" SessionField="userid" /> <asp:QueryStringParameter Name="uid" QueryStringField="memberid" /> </SelectParameters> </asp:SqlDataSource> I tried like this but it is not working. It takes at a time one sessionparameter or querystringparameter. I want if profile.aspx--> then i want session parameter in select queryIf profile.aspx?id=12432---> then i want querystringparameter in select query.
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Feb 17, 2006
How to pass a null to SelectParameters in SqlDataSource?
The type of "CreateDate" is DateTime, the following code can be run correctly!
SqlDataSource1.SelectParameters["CreateDate"].ConvertEmptyStringToNull = true;SqlDataSource1.SelectParameters["CreateDate"].DefaultValue = "2006-11-12";
now I hope to pass null value to the Parameter "CreateDate", but the following 3 section codes don't work!
SqlDataSource1.SelectParameters["CreateDate"].ConvertEmptyStringToNull = true;SqlDataSource1.SelectParameters["CreateDate"].DefaultValue = string.Empty;
or
SqlDataSource1.SelectParameters["CreateDate"].ConvertEmptyStringToNull = true;SqlDataSource1.SelectParameters["CreateDate"].DefaultValue =null;
or
SqlDataSource1.SelectParameters["CreateDate"].ConvertEmptyStringToNull = true;SqlDataSource1.SelectParameters["CreateDate"].DefaultValue = "";
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Mar 2, 2007
I Have This StoredProcedure
ALTER PROCEDURE dbo.Default_Edit1
( @ID int, @Family Nvarchar (100) OutPut
)
AS
SELECT @Family=Family FROM Table1 where (ID=@ID)
RETURN
I went to use SqlDataSource1.SelectParameters to Return Data
Ho to get and set @ID , @Family with SelectParameters ?
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Nov 14, 2007
I have a simple gridview that loads on page load. It uses an on page sqldatasource declaration in which there's a parameter in which value is already available in cookies. I added an asp:HiddenField and set that value on PageLoad() to the value of the cookies. I then set a FormParameter in the sqldatasource mapped to that hidden field. However that appears to have no effect at all. I'm guessing the sqldatasource will only use the form field after postback.
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